Geophysical Well Logging Approach Towards Resolving Groundwater Problems of Kolo Community Niger Delta, Nigeria

Abstract

The need to find suitable aquifers for underground water production for the use of Kolo Community in Niger Delta Southern Nigeria was identified. Four pilot boreholes were drilled to the depth of 100m each with Gamma Ray and Electric logs comprising of SP, SPR, Resistivity (N8, N16, N32, and N64) ran in the four wells to their total drilled depths. From the gamma ray log, five to six aquifers with average thickness varying from 2m to 19m were identified. Resistivity data obtained were generally low and resistivity values above 600 Ohm-m were recorded to be aquifers with higher groundwater quality and aquifers with resistivity values below 600 Ohm-M were considered to be highly contaminated. For Kolo community, fresh water exploitation should be done with boreholes drilled to a depth of approximately 60metres and the borehole screen properly placed between 48 to 57 meters. It is hereby concluded that the gamma ray and electric logs can effectively be utilized to characterize aquifers to solve underground water problems in riverine areas of the Niger Delta, Nigeria.